If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
In older people, memory is best early in the morning and then declines during the late afternoon.
33
25% of your bones are located in your feet.
12
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Your skeleton keeps growing until you are about 35, then you start to shrink.
74
Household bleach is the recommended chemical to decontaminate people exposed to the anthrax virus, by the U.S. F.D.A.
16
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33